Apparatus for removing gases from liquids



H. FOTHEHGILL.

APPARATUS FOR REMOVING GASES FROM LIQUIDS. APPLICATION FILED DEC. 27, l92l.

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H. FOTHERGILL. APPARATUS FOR REMOVING GASES FROM LIQUIDS.

APPUCATION FILED DEC-27,192I. LfififiSg, Patented'May 16, 1922;

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H. FOTHERGILL.

APPARATUS FOR REMOVING GASES FROT /I uoums. APFUCATION FILED D5027 192!- i, 15,6323. Patented May 16, 1922.

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lowinses, may t water screen so that any vapour in the outlet pipe will be delivered to and condensed witl1- in the. deaeration vessel. Suitable means can be provided for producing a partial vacuum in the deaerating vessel in order to promote rapid deaeration of the feed water and in; the construction bein described I propose to employ a small steam operated ejector 9 withdrawing from an outlet 10 in the top of the vessel 1 and producing a partial vacuum in the vessel, this ejector also operating as the means for discharging the air liberated from the feed water.

In order to clearly understand the operation of my invention reference should be made to Fig. 3 of the drawings which illustrates. by way of example, one form of application to the boiler feed water system of a steam ship. Condensate discharged from the condenser is delivered to a filter or feed tank 11, which also receives drainage and feed make up water. From this filter or tank 11 the water is delivered by a. hotwell or other suitable pump 12 to the deaerating vessel into which it is sprayed under the pump pressure through a suitably loaded valve 13.

The steam for heating the water in the deaerating vessel is supplied from the auxiliary exhaust steam system, and the condensate from the heating tubes 6 can be led through a pipe 14 to the filter or feed tank 1.1, such pipe, or another pipe when desired, being arranged of suflicient size to provide for a supply of steam from the tubes for direct contact heating in the filter or feed tank. The feed water outlet 8 from the deaerating vessel is connected to the suction pipe of the feed pump 15, to the reserve feed tank 16 or coi'iveniently may be required, and the ejector 9 can be supplied with high pressure or exhaust steam, the discharge from the ejector being let into the auxiliary condenser or elsewhere.

The degassed or deaerated water may be passed through a surface heater 17 of usual form and this surface heater may be provided with a bypass pipe 18 controlled by valves 19 so that when desired the surface heater 17 can be cut out of circuit. In the drawings the arrows indicate the normal direction of flow.

It will of course be understood that the deaeration vessel may be provided with the usual adjuncts and accessories.

\Vhat I claim and desire to secure by Letters Patent is zl. Apparatus for removing gases from liquids comprising a \essel having an upper part constituting a direct contact condenser and a lower part constituting a surface heater, means for introducing the liquid to be treated into the upper part, means for causing said liquid to fall in a shower from the upper part ontothe heated surface, said means extending from one side of the vessel to the other, an outlet for air in the upper surface and permits the air to pass off to the air outlet.

2. Apparatus for removing gases from liquids comprising a vessel having an upper part and a lower part open to each other, a surface heated from an external source in its lower part, 'an outlet for the escape of liberated gases in the upper part, and an inlet for the -liquid to be treated intermediate the gas outlet in said upper part and the heated surface, means for causing the admitted liquid to be projected in a shower on to the heated surface including a partition dividing the vessel into upper and lower compartments whereby gas is liberated by contact with the heated surface and condensible vapor and incondensible gas pass upwardly together through the incoming shower so that the vapor is re-condensed and the gas escapes.-

3. Apparatus for removing gases from liquids comprising a vessel having an upper part and a lower part, an inlet into the top of said upper part through which the liquid to be degassed is introduced, a surface heated from an external source located in the lower part of said vessel, common means for projectii'ig the liquid to be degassed evenly and in finely divided condition on to the heated surface and for the escape of all vapors resulting therefrom and an outlet forliberated air in the top of said upper part whereby vapor rising with the liberated air from the heated surface is recoudensed and the air passes off.

4. Apparatus for removing gases from liquids comprising a vessel having an upper part of substantially circular plan and a lower part of substantially pear-shaped cross section, an inlet branch formed integral with and at the top of the upper part an inlet opening in said branch situated centrally of the upper part, a heated surface composed of horizontal tubes located in the lower part and adapted to be heated from an external source and a perforated screen located in the upper part and interposed between the centrally situated inlet opening and the heated surface wherebv the water to be degassed is showered on to the heated surface, means for-disposing ot' the liberated air and an outlet for the withdrawal of the degassed liquid.

5. Apparatus for removing gases from liquids comprising a vessel having an upper part con tituting a direct contact condenser and a lower part constituting a surface heater, means for introducing the liquid to be treated into the upper part,

common means For causin said liquid to fall in a shower from the upper part on to the heated surface and to cause contact between all the resulting apors and ungassed liquid, an outlet for air in the upper pa 't, said outlet being located above the liquid inlet whereby the incoming liquid operates by direct contact to condense liquid vapor rising with the air from the heated surface and permits the air to pass oil to the air outlet, an outlet for the degassed liquid and a pipe connection leading from said outlet to the upper part of the vessel.

6. Apparatus for removing gases from liquids comprising a vessel having an upper part of substantially circular plan and a lower part of substantially pear-shaped cross section, an inlet branch tor-med integral with and at the top of the upper part, an inlet opening in said branch sit'u ated centrally ot' the upper part, a heated suria'ce composed o't horizontal tubes located in the lower part and adapted to be heated from an external source and a perforated s :reen located in the upper part and inter- POSGt between the centrally situated inlet opening and the heated surface whereby the water to be degassed is showered on to the heated surface, means For disposing oil the liberated air, an outletfor the withdrawal or" the degassed liquid, and a pipe connection between the outlet for the degassed liquid. and the upper part of the vessel.

7. Apparatus for removing gases from liquids comprising a ertieal cylindrical chamber into which the liquid to be treated is introduced in the form of a spray, a horizontal pear-shaped chamber immediately under said vertical chamber into which the liquid sprays on to a bank of steam tubes heated from n external source located within said pee, shaped chamber,

and an outlet for the de assed li( uid to ii-ass a l from the vessel whereby the upwardly lowing gas and vapor inter-mingle with the down-flowing liquid.

l). Apparatus tor removing gases from liquids comprising a vertically disposed deaeratiou rhan'iber, a perforated conical partition extending completely across said chamber, a surface heated from an external source and locatedin a chamber below said conical partition. means for projecting liquid to be treated on to said perforated partition, whence it flows through the perforations onto the heated surface, means for discharging or er'mitting the escape of the liberated gas and an outlet for the degassed liquid to pass from the vessel whereby the upwardly flowing gas and apor intermingle with the down-llmving steam.

1!) A process of deaerating water which consists in dropping the water to be aerated on a surface heated to a temperature sufficiently higher u said rater to liberate the gases and causing said gases to pass through the dropping water to remove any water Vapor in the gases, and thereafter removing the gases.

In testimony whereof, l afiix my signature. 

